Publisher： John Wiley & Sons Inc
E-ISSN： 1521-4117|934-0866|9|880-885
ISSN： 0934-0866
Source： PARTICLE & PARTICLE SYSTEMS CHARACTERIZATION (ELECTRONIC), Vol.934-0866, Iss.9, 2015-09, pp. : 880-885
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Abstract
Ni20[(OH)12(H2O)6][(HPO4)8(PO4)4]·12H2O nanorods are successfully synthesized via a one‐pot hydrothermal reaction. A high‐performance flexible asymmetric all‐solid‐state supercapacitor based on the obtained Ni20[(OH)12(H2O)6][(HPO4)8(PO4)4]·12H2O nanorods (positive electrode) and graphene nanosheets (negative electrode) is successfully assembled. It is the first report of this nanomaterial applied for all‐solid‐state supercapacitors. Interestingly, a maximum volumetric energy density of 0.446 mW h cm−3 at a current density of 0.5 mA cm−2 and a maximum power density of 44.1 mW cm−3 at a current density of 6.0 mA cm−2 are achieved by the as‐assembled device. What's more, the device also shows excellent mechanical flexibility and little capacitance change after over 5000 charge/discharge cycles at a current density of 0.5 mA cm−2.
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